CN217838926U

CN217838926U - Automatic backflow stirring methane tank for straw fermentation

Info

Publication number: CN217838926U
Application number: CN202221695334.1U
Authority: CN
Inventors: 孙章龙
Original assignee: Qiannong Energy Co ltd
Current assignee: Qiannong Energy Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-11-18
Anticipated expiration: 2032-06-30

Abstract

The utility model relates to a methane-generating pit field specifically is an automatic stirring methane-generating pit that flows back of straw fermentation, including the cell body, the inside fixedly connected with U-shaped pipe of cell body, the solid material pond of one end fixedly connected with of U-shaped pipe, the other end fixedly connected with back flow of U-shaped pipe, the U-shaped pipe is fermentation zone and backward flow district two parts with the inside interval of cell body with solid material pond, fermentation zone and backward flow district are linked together at the bottom of the pool of cell body, the upper end of back flow is higher than the liquid level of natural pond liquid in the fermentation zone, the effect is through utilizing the step-up and the step-down of natural pond gas in the fermentation zone, extrude natural pond liquid during the pressurization, make liquid level in the backward flow district rise and flow to in the solid material pond, after the step-down, solid material pond and the liquid level in the backward flow will tend to keep level, natural pond liquid in the backward flow just can spill over and flow back to the fermentation zone, make the natural pond liquid form the backward flow in the fermentation zone, stir natural pond liquid, break the layering phenomenon of natural pond liquid, improve biogas production rate.

Description

Automatic backflow stirring methane tank for straw fermentation

Technical Field

The utility model relates to the field of methane tanks, in particular to an automatic backflow stirring methane tank for straw fermentation.

Background

The biogas is a combustible gas generated by organic substances through microbial fermentation in an anaerobic environment under the conditions of certain temperature, humidity and pH value, most common biogas digesters are subjected to static fermentation, and the biogas slurry in the biogas digesters can generate a layering phenomenon, so that a microorganism depletion region, a fermentation blind region and a feed liquid short circuit exist in the biogas digesters, the gas yield is low, and the slag removal and discharging are difficult.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automatic backflow stirring methane tank for straw fermentation, which solves the problems in the background technology.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an automatic stirring methane-generating pit that flows back of straw fermentation, includes the cell body, the inside fixedly connected with U-shaped pipe of cell body, the one end fixedly connected with solid material pond of U-shaped pipe, the other end fixedly connected with back flow of U-shaped pipe, the U-shaped pipe is fermentation zone and backward flow district two parts with the inside interval of cell body with solid material pond, fermentation zone and backward flow district are linked together at the bottom of the pool of cell body, the upper end of back flow is higher than the liquid level of natural pond liquid in the fermentation zone.

Preferably, the upper end of cell body just is located the top fixedly connected with fluid pipe in fermentation district, the upper end of cell body just is located the top fixedly connected with solid body pipe in solid material pond, the fluid pipe all is equipped with the apron with the upper end of solid body pipe.

Preferably, a communicating pipe is fixedly connected to the U-shaped pipe.

Preferably, one side of cell body is equipped with the water tank, the inside of cell body just is located the fermentation and is equipped with the heat exchange tube in the district, the both ends of heat exchange tube all run through the lateral wall of cell body and communicate with the water tank, install solar collector on the water tank, install the water pump on the heat exchange tube.

Preferably, a gas collection tank is arranged above the tank body and communicated with the tank body through a gas inlet pipe.

Preferably, the upper end of the tank body is fixedly connected with a glass plate.

Compared with the prior art, the beneficial effects of the utility model are that:

1. by utilizing the pressure rise and the pressure reduction of the biogas in the fermentation area, the biogas slurry is extruded during the pressure increase, so that the liquid level in the backflow area rises and flows to the solid material pool, after the pressure reduction, the liquid levels in the solid material pool and the backflow pipe tend to be level, the biogas slurry in the backflow pipe overflows and flows back to the fermentation area, the biogas slurry in the fermentation area forms backflow, the biogas slurry is stirred, the layering phenomenon of the biogas slurry is broken, and the biogas production rate is improved;

2. by separately placing the fluid raw material and the solid raw material, the biogas residue in the solid material pool can be deposited at the bottom of the U-shaped pipe, and the biogas residue cannot be mixed with biogas slurry in the fermentation area, so that the residue is convenient to remove;

3. biogas slurry in the fermentation area is heated through the heat exchange tube, so that the biogas production rate is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: the device comprises a tank body 1, a U-shaped pipe 2, a solid material tank 3, a return pipe 4, a fermentation area 5, a return area 6, a fluid pipe 7, a solid pipe 8, a cover plate 9, a communicating pipe 10, a water tank 11, a heat exchange pipe 12, a solar heat collector 13, a water pump 14, a gas collecting tank 15, an air inlet pipe 16 and a glass plate 17.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below. The embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative work, all belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides an automatic backflow stirring methane tank for straw fermentation, including a tank body 1, the inside of the tank body 1 is fixedly connected with a U-shaped pipe 2, one end of the U-shaped pipe 2 is fixedly connected with a solid material tank 3, the other end of the U-shaped pipe 2 is fixedly connected with a backflow pipe 4, the solid material tank 3 is communicated with the backflow pipe 4 through the U-shaped pipe 2, the U-shaped pipe 2 and the solid material tank 3 separate the inside of the tank body 1 into two parts, namely a fermentation zone 5 and a backflow zone 6, the solid material tank 3 is communicated with the upper end of the backflow zone 6, the side wall of the solid material tank 3 is higher than the liquid level in the fermentation zone 5, the fermentation zone 5 is communicated with the backflow zone 6 at the bottom of the tank body 1, the upper end of the backflow zone 4 is higher than the liquid level of the biogas slurry in the fermentation zone 5, as shown in fig. 1, the biogas slurry in the fermentation zone 5 cannot flow into the U-shaped pipe 2 through the backflow pipe 4;

as shown in fig. 1, the dotted line in the figure is the liquid level height, when biogas slurry in the fermentation area 5 generates biogas, the biogas in the fermentation area 5 is pressurized, the biogas slurry in the fermentation area 5 is extruded, the extruded biogas slurry in the fermentation area 5 flows to the backflow area 6 through the bottom of the tank body 1, the liquid level in the backflow area 6 rises and flows into the solid material tank 3 through the side wall of the solid material tank 3 (solid arrow in the figure), and the pressurized biogas in the fermentation area 5 simultaneously pressurizes the liquid level in the backflow pipe 4, so that a height difference is formed between the liquid levels in the solid material tank 3 and the backflow pipe 4 which are communicated through the U-shaped pipe 2, and at this time, the biogas slurry in the solid material tank 3 cannot flow back to the fermentation area 5 through the U-shaped pipe 2 and the backflow pipe 4 in sequence;

as shown in fig. 1, when the biogas in the fermentation area 5 is reduced, the biogas is reduced in pressure, and at this time, the biogas does not extrude the liquid level in the fermentation area 5 and the liquid level in the return pipe 4, the liquid level in the solid material tank 3 and the liquid level in the return pipe 4 tend to be level, and the biogas slurry in the return pipe 4 overflows and flows back into the fermentation area 5 (dotted arrow in the figure), so that the biogas slurry in the fermentation area 5 flows back, the biogas slurry is stirred, the layering phenomenon of the biogas slurry is broken, the biogas production rate is improved, the backflow is not required to be carried out by means of external equipment, and the automatic backflow is realized by using the pressure of the biogas.

Particularly, the upper end of cell body 1 and the top fixedly connected with fluid pipe 7 that is located fermentation zone 5, the upper end of cell body 1 and the top fixedly connected with solid pipe 8 that is located solid material pond 3, through fluid pipe 7 to the injection fluid raw materials of fermentation zone 5, through solid pipe 8 to solid material pond 3 injection solid raw materials, separately place fluid raw materials and solid raw materials, the follow-up clearance of being convenient for to the automatic backward flow of cooperation natural pond liquid ferments smoothly, fluid pipe 7 all is equipped with apron 9 with the upper end of solid pipe 8, and fluid pipe 7 and solid pipe 8 can be stopped up to apron 9.

Specifically, the communicating pipe 10 is fixedly connected to the U-shaped pipe 2, the water content of the straw is low, and the generated biogas residues are solid, as shown in fig. 1, the communicating pipe 10 is communicated with the side wall of the U-shaped pipe 2, the biogas residues in the solid material tank 3 can be deposited at the bottom of the U-shaped pipe 2, at the moment, the communicating pipe 10 can also be smoothly communicated with the solid material tank 3 and the return pipe 4, and the biogas residues cannot be mixed with biogas slurry in a fermentation area, so that the residues can be conveniently removed.

Particularly, one side of cell body 1 is equipped with water tank 11, the inside of cell body 1 just is located fermentation zone 5 and is equipped with heat exchange tube 12, the both ends of heat exchange tube 12 all run through the lateral wall of cell body 1 and communicate with water tank 11, install solar collector 13 on the water tank 11, solar collector 13 can heat the water in the water tank 11, install water pump 14 on the heat exchange tube 12, like figure 1, water pump 14 provides power for the hot water formation circulation in water tank 11 and the heat exchange tube 12, thereby heats the natural pond liquid in the fermentation zone 5, improves marsh gas productivity.

Specifically, a gas collection tank 15 is arranged above the tank body 1, the gas collection tank 15 stores methane, the gas collection tank 15 is communicated with the tank body 1 through an air inlet pipe 16, as shown in fig. 1, the methane in the tank body 1 enters the gas collection tank 15 through the air inlet pipe 16, and the gas collection tank 15 is connected with external gas utilization equipment through a pipeline.

Specifically, the upper end of the tank body 1 is fixedly connected with a glass plate 17, and sunlight can penetrate through the glass plate 17 and shine into the tank body 1, so that the methane production rate is improved.

The working principle is as follows: as shown in fig. 1, a dotted line in the figure is a liquid level height, when biogas slurry in the fermentation area 5 generates biogas, the biogas in the fermentation area 5 is pressurized and extrudes the biogas slurry in the fermentation area 5, the biogas slurry extruded in the fermentation area 5 flows to the backflow area 6 through the bottom of the tank body 1, the liquid level in the backflow area 6 is raised and flows into the solid material tank 3 through the side wall of the solid material tank 3, and the pressurized biogas in the fermentation area 5 simultaneously pressurizes the liquid level in the backflow pipe 4, so that a height difference is formed between the liquid levels in the solid material tank 3 and the backflow pipe 4 which are communicated through the U-shaped pipe 2, and the biogas slurry in the solid material tank 3 cannot flow back to the fermentation area 5 through the U-shaped pipe 2 and the backflow pipe 4 in sequence;

as shown in fig. 1, when the biogas in the fermentation area 5 is reduced, the biogas is reduced in pressure, and at this time, the biogas does not extrude the liquid level in the fermentation area 5 and the liquid level in the return pipe 4, the liquid level in the solid material tank 3 and the liquid level in the return pipe 4 tend to be level, and the biogas slurry in the return pipe 4 overflows and flows back to the fermentation area 5, so that the biogas slurry in the fermentation area 5 flows back, the biogas slurry is stirred, the layering phenomenon of the biogas slurry is broken, and the biogas production rate is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a straw fermentation automatic reflux stirring methane-generating pit, includes cell body (1), its characterized in that: the inside fixedly connected with U-shaped pipe (2) of cell body (1), the solid material pond of one end fixedly connected with (3) of U-shaped pipe (2), the other end fixedly connected with back flow (4) of U-shaped pipe (2), the inside interval of cell body (1) is fermentation zone (5) and return flow district (6) two parts with solid material pond (3), fermentation zone (5) are linked together at the bottom of the pool body (1) with return flow district (6), the upper end of back flow (4) is higher than the liquid level of natural pond liquid in fermentation zone (5).

2. The straw fermentation automatic backflow stirring biogas digester as claimed in claim 1, wherein: the fermentation tank is characterized in that the upper end of the tank body (1) is fixedly connected with a fluid pipe (7) above the fermentation area (5), the upper end of the tank body (1) is fixedly connected with a solid pipe (8) above the solid tank (3), and the fluid pipe (7) and the upper end of the solid pipe (8) are both provided with a cover plate (9).

3. The straw fermentation automatic backflow stirring biogas digester as claimed in claim 1, wherein: the U-shaped pipe (2) is fixedly connected with a communicating pipe (10).

4. The straw fermentation automatic backflow stirring biogas digester as claimed in claim 1, wherein: one side of cell body (1) is equipped with water tank (11), the inside of cell body (1) just is located and is equipped with heat exchange tube (12) in fermentation district (5), the both ends of heat exchange tube (12) all run through the lateral wall of cell body (1) and communicate with water tank (11), install solar collector (13) on water tank (11), install water pump (14) on heat exchange tube (12).

5. The straw fermentation automatic backflow stirring biogas digester as claimed in claim 1, wherein: and a gas collection tank (15) is arranged above the tank body (1), and the gas collection tank (15) is communicated with the tank body (1) through a gas inlet pipe (16).

6. The automatic backflow stirring biogas digester for straw fermentation according to claim 1, wherein: the upper end of the tank body (1) is fixedly connected with a glass plate (17).